A Multi-load Wireless Power Transfer System Based on Parity-Time Symmetry

In multi-load wireless power transfer (WPT) systems, the implementation of the parity-time (PT) symmetry principle facilitates adaptive frequency tracking to stabilize both power transfer efficiency (PTE) and power delivered to the load (PDL). Nevertheless, current research on multi-load WPT systems adhering to PT symmetry mandates that all loads be identical. This stringent requirement inevitably constrains the system’s practical utility and applicability in real-world scenarios. This conference finds that under load deviation, multi-load WPT systems can also maintain PT symmetry based on coupled mode theory. Notably, within the region of strong PT-symmetric coupling and identical coupling coefficients, each load can consistently maintain stable PTE and PDL. Our work establishes a more extensive application foundation for high-order multi-load PTs-WPT systems.